benzyl (4aR,6R,7S,8R,8aR)-7,8-diacetyloxy-6-(acetyloxymethyl)-3-phenylmethoxy-6,7,8,8a-tetrahydro-4aH-pyrano[3,2-e][1,3,4]oxadiazine-1-carboxylate 、
methyl 2-O-benzoyl-4,6-di-O-benzylidene-α-D-glucopyranoside 在
三氟化硼乙醚 作用下,
以65%的产率得到dibenzyl 1-((2S,3R,4R,5S,6R)-4,5-diacetoxy-6-(acetoxymethyl)-2-(((2R,4aR,6S,7R,8S,8aR)-7-(benzoyloxy)-6-methoxy-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-8-yl)oxy)tetrahydro-2H-pyran-3-yl)hydrazine-1,2-dicarboxylate